Also they offered various options to appease the author including code forking and the author rejected them all. Basically the team exhausted all of their options to make this author happy but the author seem not to understand the reality of FOSS. This author shouldn't be in the FOSS if the author is going to roadblock every options despite his licensing explicitly allows including the codes.
Agreed. If he wants to be stubborn like this he just should change his licensing so it can't be included anywhere else upstream and that would put an end to it.